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Expired European patentEurope

Amorphous copolymers of perfluoro-2,2-dimethyl-1,3-dioxole

EP 0073087 B1 · Applicant: E.I. DU PONT DE NEMOURS AND COMPANY

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed August 19, 1982 and granted May 28, 1986. A European patent lasts at most 20 years from filing, so its term ended August 19, 2002.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by February 19, 2008.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledAugust 19, 1982
PublishedMarch 2, 1983
GrantedMay 28, 1986
Term endedAugust 19, 2002
Application numberEP 82201044
Classification (CPC)C08F234/02

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedAug 19, 1982PublishedMarch 2, 1983Patent grantedMay 28, 1986Term endedAug 19, 2002

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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